Energy Panel (EP)A piece of glass, annealed or tempered, and finished on the edges by a surround.
EPs are applied to windows or doors and rest on the glazing stop. EPs offer the homeowner added energy
efficiency.

EspagnoletteTilt-Turn hardware which
houses the gear mechanism for the Tilt-Turn, inswingingcasement and
hopper handles.

Extreme Fiber Stress in Bending (Fb)The allowable unit stress used in the design of bending members such as beams,
trusschords, joists and rafters.

ExtrusionAn article or product of vinyl or metal made by the process of extruding. Extrusions
include vinyl sill and head jamb tracks, vinyl jamb liners and aluminum cladding
used on the exterior of clad units.